Standardize usage of virtual/override/final in chrome/browser/extensions/

chrome/browser/extensions/api/location/location_api.h

Index: chrome/browser/extensions/api/location/location_api.h
diff --git a/chrome/browser/extensions/api/location/location_api.h b/chrome/browser/extensions/api/location/location_api.h
index bfdbcc4d11ed74b5b8ae8182b9f87019cc6c1723..300b003511912d5b9676275c19899503fca13432 100644
--- a/chrome/browser/extensions/api/location/location_api.h
+++ b/chrome/browser/extensions/api/location/location_api.h
@@ -15,10 +15,10 @@ class LocationWatchLocationFunction : public ChromeSyncExtensionFunction {
                              LOCATION_WATCHLOCATION)
 
  protected:
-  virtual ~LocationWatchLocationFunction() {}
+  ~LocationWatchLocationFunction() override {}
 
   // SyncExtensionFunction:
-  virtual bool RunSync() override;
+  bool RunSync() override;
 };
 
 class LocationClearWatchFunction : public ChromeSyncExtensionFunction {
@@ -27,10 +27,10 @@ class LocationClearWatchFunction : public ChromeSyncExtensionFunction {
                              LOCATION_CLEARWATCH)
 
  protected:
-  virtual ~LocationClearWatchFunction() {}
+  ~LocationClearWatchFunction() override {}
 
   // SyncExtensionFunction:
-  virtual bool RunSync() override;
+  bool RunSync() override;
 };
 
 }  // namespace extensions